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they included some weird poly bush, that looks like a big pineapple slice, which ends up being unusable, at least in a w201. I think, for certain rear ends, it may not apply? I haven't been under a 124 or 129 for a while, might be for them since it's a triple model kit. Also the chassis post on the w201 is not long enough to sit in the metal cup if that big pineapple slice is used, not sure wtf they were thinking, and they never answered my emails about it, though I never called, so there's that.

I installed mine without it, which is the same setup as the oem part and delrin stuff floating around.

Thanks for the quick response! Makes sense, the same kit is listed for W124. I'll give calling them a shot tomorrow, otherwise I'll just install it without the pineapples. Just seems weird because it looks to me like the metal part of the subframe would contact the chassis without something between. The stock bushings had little volumes that would separate the chassis from the subframe. Maybe I'm overthinking it...

This is the response I got from strongflex regarding subframe
Hello,
Subframe bushes could be installed only one way. When you start to fit them you'll see there is no other way.
I just replied about the pineapple piece, might get a response today.

I installed the subframe bushings without the "pineapple". Seems to make sense. Has anyone replaced the bushings on their rear suspension arms? Some of them have metal sleeves that I'm guessing are expected to be pressed into the arms, then the two piece poly bushings into which a bolt retainer is pressed into. The fit seems pretty tight for the metal sleeves.

yeah, they need to be pressed. don't go crazy with the grease or they will hydraulically push the poly out the other end. best way to do it is to press the out sleeve into the arm, then pop the poly's into the outer sleeve, then press in the center sleeve, with only a light coating of grease. use a cup shape on the bottom or the poly can also push out its edges once released from the press. dont mix up the 818's and 819's, and don't forget to use the new washers on the outers.